Improvement in rotary engines



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Rotary Engines. N0.l52,l57. PatenAtedJunsl6,l874.

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UNITED STATES PATENT EEICE.

EDVARI) MYERS, 0F NE\V YORK, N. Y.

IMPROVEMENT IN ROTARY ENGINES.

Spfcitication fcrinil g part of Leiters Patent No. 152,157, dat d .lune lli, 1574; application llrd March 21, 1314.

T o all whom it may concern:

Be it known that I, EDWARD h'lYERs, of the city, county, and State of New York, have invented a new and useful Improvement in Rotary Engines, of which the following is a specification Figure 1, Sheet 1, is a vertical longitudinal section of my improved rotaryT engine. Fig. 2, Sheet l, is a detail cross-section of the same, taken through the line :l: x x fr, Fig. l. Fig. 3, Sheet 1, is a longitudinal section of the piston, taken through the line y y, Fig. 4. Fig. 4, Sheet 1, is a longitudinal section of the same, taken through the line z z, Fig. 3. Fig. 5, Sheet 2, is an end view of the same, the cylinder-head being removed, and the steamchest being shown in section. Fig. G, Sheet 2, is a detail section, taken 'through the line c c, Fig. 5. Fig. 7, Sheet 2, is a detaillongitudinal section of the piston. Fig. S, Sheet 2, is a detail cross-section of the saine, taken through the line w w, Fig. 7. Fig. 9, Sheet 2, is the same sect-ion as Fie'. 8, the piston-stem and fastenl ing-block and pin being removed. Fig. l() are detail sections, showing a modification of the same. Fi'. 11 is a detail view, showing a modification ofthe anged or fluked head of the piston.

Similar letters of reference indicate correspondin g parts.

The invention will first be fully described, and then pointed out in the claims.

A is the cylinder, which is provided with heads a a2 in the ordina-ry manner, and with a central partition or head, c3. B is the shaft, which passes through the centers of the three heads al a2 a3, and revolves in stufling-boxes in said centers. In the inner sides of the two outer heads al c2, and in the opposite sides of the central head a3, are formed circular cavities C, concentric with respect to cach other, eccentric with respect to the heads al a2 a3, and tangent t0 the inner surface ofthe cylinder A,

l. between the ports D. E are hollow drums or cylinders, which are made of such a size that their ends may t into the cavities C, and abut against the heads al c2 a3, as shown in Fig. 1. The cavities of the hollowcylinders or drums E are made of such a size that the shaft B may pass through them, and that the said cylinders 0r drums may roll in the cavities C around lution.

the said shaft B. In the ring ends of the cylinders or drums E, close to the circumference of said ends, and extending longitudinally through said shell, are formed round holes, in which are placed cylinders or bearings F, the face of the drums being slotted directly opposite the said cylinders F. The cylinders F are slotted longitudinally, as shown in Figs. 2, 6, 7, S, 9,10,to receive the shanks or stems of the pistons G, which stems are made rect angular in their crosssection, and in their inner ends are formed holes to receive the shaft B, to which they are secured by a feather, key, orother suitable means, so that the said pistons may carrythe said shaft wit-h them in their revo- 1`he outer end or head of the pistons Gr is made with flanges or iukes upon its op posite sides, fitting into a recess in the faccof the drums E, as shown in Figs. 2, 5, and 11, and its outer surface is curved to correspond with the curvature ofthe inner surface of the cylinder A, as shown in Figs. 2 and 5. H is the steam-chest, from which two branch ports, D, lead into the cylinder A upon the opposite sides of the central head a3, a-nd at a little dista-nce from each other, as shown' in dotted lines in Figs. 1, 2, and 5. I is the exhaust-port,

which is placed between the ports D, and may be connected with either ot' said ports D, according to the direction in which it is desired to have the engine run by the slide-valve J, the stem K of which passes out through a stuft'- ing-box in the side of the steam-chest H, so that the engine can be reversed by simply shifting the valve J. By this construction, as the steam is admitted through one of the ports D, it forces the piston G around Vthe inner sur face of the cylinder A, the steam in front of said piston all the time exhausting through the other port D. The stem of the piston G being' rigidly attached'to the shaft B and passing through the shell of the drum E, the movenient of the piston will rotate the said shaft and drum about their separate axes. The eccentricity of the drum E and shaft B with respect to each other, and the location cf the ports I) with respect to said axes, gives more space for the steam as it expands, said space being the greatest when the piston is at the side of the cylinder A opposite to the ports D.

If desired, t-he piston G may be made with detachable top and edge plates g1 g2, as shown in Figs. 3 and 4, which may be kept in place by dowel-pins, and held out against the concave surface of the cylinder A and the end parts of the cylinder F by coiled springs L, placed in the dowel-pin holes, and pressing again st the inner ends of said dowel-pins. The two pistons, G, upon the opposite sides of the central head a?, are so arranged upon the shaft B as to be directly opposite each other, so that the one will bc acting with its greatest power as the other is approaching its dead-point. Then the piston G is made in one solid piece, or with detachable top and edge plates, and is slipped into the cylinder F from the outer side, the body and inner end of said piston have to be of the saine thickness, and the inner end has to be thick enough to give the requisite strength when perforated for the passage of the shaft B. rlhis requires the shank or stein ofthe piston G to be made unnecessarily heavy. To avoid this useless weight, the head ofthe piston may be made separate from its stein, and secured to it by screws, as shown in Figs. 5 and l0, so that the head may be detached and the stein inserted and withdrawn through the interior of the drum E; or a portion of one end ofthe drum E around the hole for the slotted cylinder F may be out out and replaced by a piece, e', secured by screws, so as to be readily detached and replaced. rlhis allows the piston G and cylinder F to be removed together from the drinn E, the piston-stem passing out edgewise. In this case the slot in the cylinder F should be extended out through one end of said cylinder, and closed, when the piston-stein is inserted, by a block,j", iitted into the open end and secured by a crosspin, as shown in Figs. 8 and 9. The outer edges of the iianges or linkes of the piston-heads G may be made parallel with the sides of the piston-stein, or they may be inclined, as shown in Fig. ll, to cut ofi1 and adlnit the steam gradually.

Upon the inner side of the heads al a2, and upon both sides of the central head a3, around the holes through which the shaft B passes, are formed stationary collars M, the free ends of which rest against the side edges of the inner ends ofthe pistonsG, to prevent said pistons from moving longitudinally upon the shaft B, and thus cause the said pistons to work squarely and freely in the slots of the cylinders F.

Having thus described 1n y invention, I claim as new and desire to secure by Letters Patentl. The slotted cylinder or bearing F, niade with a detachable piece, j", in its end, to allow the piston-stein to be removed from it edge wise, substantially as herein shown and described. f

y 2. The hollow slotted drum E, made with a detachable piece, e', at one end, to allow the stern of the piston to be removed from said drum edgewise, substantially as herein shown and described.

, EDWARD MYERS.

ldfitnesses:

JAMns T. GRAHAM,

T. B. Mosman. 

